Engineering calculators
Every calculation shows the result, the units and an interpretation note - so the number always comes with meaning.
Unit converter
0.100000
Converted from millimetres (mm) to centimetres (cm).
Ohm's Law Calculator
Enter any two of voltage, current and resistance - the third is calculated, plus the circuit power.
Waiting for inputs: - - Enter exactly two values.
Head / Pressure Calculator
Convert between metres of water head and pressure in kPa or psi - pump curves meet gauges here.
Waiting for inputs: - - Enter either head or pressure.
Flow Rate Calculator
Volume moved divided by time - see the result in L/min, L/s and m³/h at once.
Waiting for inputs: - - Enter volume and time.
Detention Time Calculator
How long a tank holds its volume at a given flow - the budget for disinfection and settling.
Waiting for inputs: - - Enter volume and flow.
Percent Loading Calculator
Actual load versus rated capacity - transformers, motors, breakers and lines.
Waiting for inputs: - - Enter actual and rated values.
5 unit categories supported in the converter.